OCR 21st Century Science B4 B5 B6 10th June 2016

Omg wow! How did you even manage that in 1 hour...

I know but 1 mark can be the difference between an A and an A*
I'm just really worried about it tbh

I don't know how well i did, the six markers were pretty good i thought but for the maths questions i completely messed up. First one i did 99.91% which was the wrong way round and the ratio question i got 1:640 instead of 639, maybe 1 mark for that.

The substrate question i just said that the ethanol can join to the enzyme and speed up the reaction so can help quicker as a result, might have done that wrong. The other 3 marker i said it wasn't natural so some people may not like it as two parents is the norm.

Mutation question was about triplet coding for amino acids being changed, therefore different proteins will be produced. The respiration question i put mitochondrion due to aerobic respiration and cytoplasm because of anerobic respiration. Hoping for an A overall, i feel like i should have done better on some questions though

Well what's done is done. You still have B7 right?

Yeah, I do I guess. But we didn't get taught half of it so I'm gonna have to do some serious revision over the next week or so.

Let's just try our best to boost up our average then. Same with me, we were just given worksheets and I don't understand any of it. It's gonna be a fun weekend

I'm just mad at myself for doing the straight line of best fit instead of a curve!!

Also, what did you guys get for the mice/MS/stem cell why can't they be used question?

I guessed, said mice have a different number of chromosomes to us so it wouldn't work. I was pretty clueless throughout a lot of the short answer questions tbh

Oh also guys you know that 1 marker that was like 'what type of protein could it have formed' or whatever, what did you guys put? I put amino acids because I wasn't sure

Oh also guys you know that 1 marker that was like 'what type of protein could it have formed' or whatever, what did you guys put? I put amino acids because I wasn't sure

So who did people put for the final question? Orla or Amy? (I'm not sure if either of them are even right, but I put Orla first and then crossed it out to put Amy. My gut instinct has always been wrong over the other exams, so now when I think 'hmm maybe I should change that' I just do it! But maybe I was wrong ://)

omg same, our teacher photocopied the textbook and told us to answer the questions in it and that's it. But yeah I guess we can defo boost our averages with B7

I'm just mad at myself for doing the straight line of best fit instead of a curve!!

Also, what did you guys get for the mice/MS/stem cell why can't they be used question?

I put enzymes but wasn't sure tbh. There were a lot of 1 mark questions in that paper!

I said enzymes ( which are proteins) for aerobic respiration

So who did people put for the final question? Orla or Amy? (I'm not sure if either of them are even right, but I put Orla first and then crossed it out to put Amy. My gut instinct has always been wrong over the other exams, so now when I think 'hmm maybe I should change that' I just do it! But maybe I was wrong ://)

That's what I put!